CAREER:The Electrochemical Flow Capacitor: Capacitive Energy Storage in Flowable Media

职业：电化学流动电容器：流动介质中的电容储能

• 批准号: 1351161
• 负责人: Emin Caglan Kumbur
• 金额: $ 40万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-06-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1351161&HistoricalAwards=false
• 关键词: CAREER; Electrochemical; Flow; Capacitor; Capacitive

1351161 - KumburThis CAREER proposal aims to explore a fundamentally new energy storage concept called the electrochemical flow capacitor. It exploits the characteristics behind the operation of supercapacitors and flow batteries, combining (i) the scalable energy capacity of flow batteries with (ii) high power ratings, rapid charging and long cycle-life characteristics of supercapacitors.
The main idea is capacitive energy storage in a flowable media. As such, the unique aspect is the utilization of flowable capacitive slurry electrodes
that contain porous activated carbon particles suspended in an electrolyte. Although much
is known about suspension flow and capacitive charge storage in thin film electrodes, currently
there is no theoretical framework describing the coupling between these two processes. As
a result, there are a number of fundamental questions that need to be addressed in order to
develop this concept into a practical technology. Motivated by this, the research objective
here is to establish the enabling science necessary to address the critical scientific gaps related to the capacitive charge storage in flowable media. In line with this
goal, the PI will conduct studies to (i) explore the nature of charge percolation between
the carbon particles in the slurry; and (ii) assess the interplay between slurry composition, performance, system architecture and operational losses. To amplify the impact of this research, an integrated educational plan is planned that targets
a large body of students ranging from K-12 to graduate level. The educational objectives are
a) to inspire young people, especially females and minorities, to explore careers in STEM,
and b) to enhance energy education at Drexel University. These activities include development of a new course on energy storage and research experience for undergraduates, K-12 students
and teachers by leveraging international and domestic programs at Drexel. In addition, the
PI will develop a parental engagement program that targets the parents of minority students
in Philadelphia to better utilize them as partners in STEM education. The goal will be to increase parental awareness of opportunities in STEM and help them motivate
their children to pursue careers in STEM.Intellectual Merit:This project will constitute a major step toward establishing the enabling science of flowable capacitive slurry electrodes for use in electrical energy storage. Specifically, it will provide an in-depth understanding of the nature of charge percolation between the capacitive carbon particles in a flowable slurry and help establish a framework for describing the coupling between suspension flow and capacitive charge storage. Moreover, this work will expand the knowledge in colloidal science by investigating a unique class of capacitive suspensions that can be used for energy storage. Besides contributing
to this concept, the resulting knowledge will help better understand the particle interactions and double layer formation in conventional supercapacitors, and will provide useful insights into other slurry electrode systems (e.g. capacitive water deionization and semi-solid batteries).Broader Impacts:The project will facilitate the implementation of a new energy storage concept, which can potentially approach ~10x higher power density and ~100x faster charging rates with longer lifetime (~100k cycles) than batteries. Development of such systems will overcome challenges associated with grid-scale energy storage and enable better utilization of renewable resources. This project also offers significant opportunities to extend the impact of the research to a larger audience. A large number of students will be affected by this work. Two Ph.D. students, several undergraduates, K-12 students and high school teachers will be directly involved in energy research through international and domestic programs at Drexel. Additionally, more than thirty students per year are expected to enroll in a newly developed energy storage course. Connections between research and service to society will be fostered through the parental engagement workshops that will focus on the role of engineers in society. Special emphasis in these workshops will be given to the parents of students from traditionally underrepresented groups to help increase their enrollment in STEM.

1351161-Kumbur这个职业计划旨在探索一种全新的储能概念，称为电化学流动电容器。它利用超级电容器和液流电池运行背后的特点，将(I)液流电池的可扩展能量容量与(Ii)超级电容器的高额定功率、快速充电和长循环寿命特性相结合。因此，独特的方面是利用可流动的电容式浆料电极，这种电极含有悬浮在电解液中的多孔活性碳颗粒。虽然薄膜电极中的悬浮流和电容电荷存储已知很多，但目前还没有理论框架来描述这两个过程之间的耦合。因此，为了将这一概念发展成一项实用技术，需要解决许多基本问题。出于这一动机，这里的研究目标是建立必要的使能科学，以解决与流动介质中的电容电荷存储相关的关键科学空白。根据这一目标，PI将进行研究，以(I)探索泥浆中碳颗粒之间电荷渗流的性质；以及(Ii)评估泥浆成分、性能、系统架构和运营损失之间的相互影响。为了扩大这项研究的影响，计划了一项综合教育计划，目标是从K-12到研究生水平的大量学生。教育目标是：a)鼓励年轻人，特别是女性和少数民族，探索STEM的职业；b)加强德雷克塞尔大学的能源教育。这些活动包括通过利用德雷克塞尔的国际和国内项目，为本科生、K-12学生和教师开发一门关于能源储存和研究经验的新课程。此外，国际学生联合会将制定一项家长参与计划，以费城少数族裔学生的父母为目标，以便更好地利用他们作为STEM教育的合作伙伴。目标将是提高家长对STEM机会的认识，并帮助他们激励他们的孩子在STEM追求职业生涯。智力优势：该项目将成为建立用于电能储存的流动电容式浆料电极使能科学的重要一步。具体地说，它将有助于深入了解可流动泥浆中电容碳颗粒之间的电荷渗流的性质，并有助于建立描述悬浮流动和电容电荷存储之间的耦合的框架。此外，这项工作将通过研究一种独特的可用于储能的电容悬浮液来扩展胶体科学的知识。除了对这一概念的贡献，所获得的知识将有助于更好地了解传统超级电容器中的粒子相互作用和双层形成，并将为其他浆料电极系统(例如电容式水去离子和半固态电池)提供有用的见解。广泛的影响：该项目将促进新的能量存储概念的实施，该概念可能以比电池更长的寿命(~100K循环)获得更高的功率密度和~100倍的充电速度。这种系统的开发将克服与电网规模能源储存相关的挑战，并使可再生资源得到更好的利用。该项目还提供了将研究的影响扩大到更多受众的重要机会。大量的学生将受到这项工作的影响。两名博士生、几名本科生、K-12学生和高中教师将通过Drexel的国际和国内项目直接参与能源研究。此外，预计每年将有30多名学生报名参加一门新开发的能源储存课程。通过关注工程师在社会中的作用的家长参与研讨会，将促进研究与为社会服务之间的联系。在这些讲习班中，将特别重视来自传统代表性不足群体的学生的家长，以帮助增加他们在STEM的入学人数。